铜配合物用于棉针织物低温酶氧一浴漂白

以亚氨基二乙酸(IDA)、硫酸铜、4-二甲氨基吡啶(4-DMAP)3种单体制备得到一种铜配合物催化剂,应用于棉针织物双氧水低温漂白工艺。采用紫外-可见光谱仪和高分辨离子淌度质谱等手段对该配合物的结构进行表征,探讨了漂白温度、精练酶用量、双氧水用量、金属配合物用量、漂白时间对棉针织物漂白效果的影响,同时通过桑色素的脱色实验,研究配合物对棉针织物的催化漂白机理。通过单因素试验,得到优化的漂白工艺为:H 2O 28%(owf),精练酶4 g/L,配合物30μmol/L,渗透剂JFC 2.5 g/L,浴比1∶5,70℃下浸渍漂白60 min。经过该工艺处理后,棉针织物白度可达75.88%,毛效为12.30 cm,顶破强力保留率为93.77%。

Application of Copper Complex in Low Temperature Bleaching of Cotton Knitted Fabric with Enzyme and Peroxide in One Bath

In this study,a copper complex catalyst is prepared with three monomers:iminodiacetic acid(IDA),copper sulfate and 4-Dimethylaminopyridine(4-DMAP),and it is applied in low temperature bleaching process of hydrogen peroxide for cotton knitted fabric.The structure of the complex is characterized by means of UV-Vis spectrometer and high resolution ion mobility mass spectrometry,and discussions are made on the effects of temperature,enzyme dosage,concentration of hydrogen peroxide,metal complexes and bleaching time on bleaching products of cotton knitted fabric by the complex.At the same time,the mechanism of catalysis bleaching of cotton knitted fabric with copper complex is researched through decolorization experiment of Morin.The optimized bleaching process determined through single factor test is as follows:H 2O 28%(owf),scouring enzyme 4 g/L,complex 30μmol/L,penetrant agent 2.5 g/L,liquor ratio 1:5,and bleaching at 70℃for 60 min.Through treatment via this process,the whiteness of cotton knitted fabric features can reach 75.88%,capillary effect is 12.30 cm,and bursting strength retention rate is 93.77%.